Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753804AbYCJP4Y (ORCPT ); Mon, 10 Mar 2008 11:56:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751034AbYCJP4R (ORCPT ); Mon, 10 Mar 2008 11:56:17 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:33766 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751018AbYCJP4R (ORCPT ); Mon, 10 Mar 2008 11:56:17 -0400 Date: Mon, 10 Mar 2008 08:55:41 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Ingo Molnar cc: Arjan van de Ven , KOSAKI Motohiro , Thomas Gleixner , LKML , Linus Torvalds , Andrew Morton , Bart Van Assche Subject: Re: quicklists confuse meminfo In-Reply-To: <20080309192514.GA16759@elte.hu> Message-ID: References: <20080309111456.GA21690@elte.hu> <20080309210000.C6DE.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20080309120940.GA1695@elte.hu> <20080309123432.GA3267@elte.hu> <20080309121103.3f7019d5@laptopd505.fenrus.org> <20080309192514.GA16759@elte.hu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1006 Lines: 22 On Sun, 9 Mar 2008, Ingo Molnar wrote: > > careful with this; the quicklists aren't JUST for speed they are also > > there to make sure a page we free that is a pagetable, is not reused > > until we have finished flushing the tlbs on all the cpus that saw it. > > This is a really hard correctness requirement, and while I can see > > that quicklists are probably not the best way to achieve this, we > > can't just throw away the behavior ;( > > no, that's not true anymore - and the current quicklists code doesnt do > anything like that AFAICS. It used to be a lot more complex, but now > it's just a thin wrapper around the page allocator. Sure it does that. It interacts with the TLB logic which is another bad thing as Linus has pointed out. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/